Although there is no specific time-limit on Measurement Certificates, boats do need to be re-measured if any changes that might affect the measurements have been made (like re-beaming or a new mast/boom).

I think it's safe to assume 1413 might have had some maintenance by now so I don't think it can be added to the list - do you know if it still exists?

The important ones to get listed are the currently active racing Mosquitoes.